/* ============ Design Tokens ============ */
:root {
  --c-champagne: #F5EFE6;
  --c-taupe:     #E8E1D4;
  --c-ink:       #1A1714;
  --c-ink-soft:  #5A4F44;
  --c-gold:      #BFA079;
  --c-gold-deep: #8C6F47;
  --c-clay:      #C8A786;
  --c-line:      #D6CDBE;

  --font-zh-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-zh-sans:  'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en-disp:  'Cormorant Garamond', 'Times New Roman', serif;
  --font-en-body:  'Inter', system-ui, sans-serif;
  --font-num:      'DM Serif Display', serif;

  --container-w: 1440px;
  --gutter: 8vw;
}

/* ============ Reset & Base ============ */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-zh-sans);
  color: var(--c-ink);
  background: var(--c-champagne);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }
button { font-family: inherit; cursor: pointer; }

/* ============ Type Utility ============ */
.font-zh-serif { font-family: var(--font-zh-serif); font-weight: 900; }
.font-en-disp  { font-family: var(--font-en-disp); font-style: italic; }
.font-num      { font-family: var(--font-num); }
.txt-gold      { color: var(--c-gold); }
.txt-gold-deep { color: var(--c-gold-deep); }
.txt-ink-soft  { color: var(--c-ink-soft); }

.watermark-en {
  font-family: var(--font-en-disp);
  letter-spacing: 0.04em;
  color: var(--c-gold);
  opacity: 0.18;
  font-weight: 400;
  line-height: 0.9;
  pointer-events: none;
  user-select: none;
}

.section-no {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--c-gold-deep);
  text-transform: uppercase;
}

/* ============ Layout ============ */
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 var(--gutter); }
.section   { padding: 120px 0; position: relative; }
.section-tight { padding: 80px 0; }

/* ============ Navigation ============ */
.nav-root {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav-root.is-solid {
  background: rgba(245, 239, 230, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px var(--gutter);
}
.nav-logo {
  font-family: var(--font-zh-serif);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.05em;
}
.nav-logo small {
  display: block;
  font-family: var(--font-en-disp);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--c-gold-deep);
  margin-top: 2px;
  font-weight: 400;
}
.nav-links { display: flex; gap: 48px; }
.nav-links a {
  position: relative;
  font-size: 15px;
  padding: 6px 0;
  letter-spacing: 0.08em;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; right: 50%;
  height: 1px;
  background: var(--c-gold);
  transition: left 0.3s ease, right 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.is-active::after { left: 0; right: 0; }

.nav-cta { display: flex; align-items: center; gap: 24px; font-size: 14px; }
.nav-cta .phone { font-family: var(--font-num); font-size: 18px; }
.btn-gold {
  display: inline-block;
  padding: 10px 22px;
  border: 1px solid var(--c-gold-deep);
  color: var(--c-gold-deep);
  letter-spacing: 0.15em;
  font-size: 13px;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn-gold:hover { background: var(--c-gold-deep); color: var(--c-champagne); }

/* ============ Buttons ============ */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-gold-deep);
  font-size: 14px;
  letter-spacing: 0.15em;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--c-gold-deep);
  transition: gap 0.25s ease;
}
.link-arrow:hover { gap: 18px; }

/* ============ Marquee ============ */
.marquee {
  background: var(--c-gold);
  color: var(--c-ink);
  padding: 16px 0;
  overflow: hidden;
  position: relative;
}
.marquee-track {
  display: flex;
  gap: 64px;
  white-space: nowrap;
  animation: marquee-scroll 60s linear infinite;
  width: max-content;
}
.marquee-track span {
  font-family: var(--font-en-body);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============ Scroll Fade ============ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-up.is-visible { opacity: 1; transform: translateY(0); }

/* ============ Doctor Card ============ */
.doc-card { position: relative; overflow: hidden; display: block; }
.doc-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.doc-card:hover img { transform: translateY(-6px) scale(1.02); }
.doc-card-meta { padding: 20px 0; }
.doc-card-meta .zh {
  font-family: var(--font-zh-serif);
  font-size: 26px;
  letter-spacing: 0.06em;
}
.doc-card-meta .en {
  font-family: var(--font-en-disp);
  font-style: italic;
  color: var(--c-gold-deep);
  font-size: 16px;
  margin-top: 2px;
}
.doc-card-meta .tag {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-ink-soft);
  letter-spacing: 0.05em;
}

/* placeholder doctor card */
.doc-placeholder {
  aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, #BFA079 0%, #8C6F47 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(245, 239, 230, 0.85);
  overflow: hidden;
}
.doc-placeholder .zh-big {
  font-family: var(--font-zh-serif);
  font-weight: 900;
  font-size: clamp(80px, 12vw, 180px);
  line-height: 1;
  letter-spacing: 0.02em;
}
.doc-placeholder .en-name {
  position: absolute;
  bottom: 18px;
  left: 18px;
  font-family: var(--font-en-disp);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.2em;
  opacity: 0.7;
}
.doc-placeholder::after {
  content: 'PHOTO PENDING';
  position: absolute;
  bottom: 18px;
  right: 18px;
  font-family: var(--font-en-body);
  font-size: 10px;
  letter-spacing: 0.3em;
  opacity: 0.5;
}

/* ============ Treatment Row ============ */
.tr-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--c-line);
  transition: padding 0.4s ease, background 0.4s ease;
  cursor: pointer;
}
.tr-row:last-of-type { border-bottom: 1px solid var(--c-line); }
.tr-row .no {
  font-family: var(--font-num);
  font-size: 22px;
  color: var(--c-gold-deep);
}
.tr-row .name-zh {
  font-family: var(--font-zh-serif);
  font-size: 32px;
}
.tr-row .name-en {
  font-family: var(--font-en-disp);
  font-style: italic;
  font-size: 15px;
  color: var(--c-gold-deep);
  margin-top: 4px;
  letter-spacing: 0.1em;
}
.tr-row .arrow { font-size: 24px; color: var(--c-gold-deep); transition: transform 0.3s ease; }
.tr-row:hover { padding-left: 16px; background: rgba(191, 160, 121, 0.08); }
.tr-row:hover .arrow { transform: translateX(8px); }

/* ============ Big Numbers ============ */
.num-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.num-wall .num {
  font-family: var(--font-num);
  font-size: clamp(72px, 12vw, 180px);
  line-height: 0.9;
  color: var(--c-ink);
}
.num-wall .num .plus { color: var(--c-gold); font-size: 0.6em; vertical-align: top; }
.num-wall .label {
  margin-top: 16px;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--c-ink-soft);
  text-transform: uppercase;
}
.num-wall .label-zh {
  margin-top: 6px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--c-ink);
}

/* ============ Footer ============ */
.footer {
  background: var(--c-ink);
  color: rgba(245, 239, 230, 0.7);
  padding: 80px 0 32px;
  font-size: 14px;
}
.footer a:hover { color: var(--c-gold); }
.footer .grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer h4 {
  font-family: var(--font-zh-serif);
  font-size: 16px;
  color: var(--c-gold);
  margin: 0 0 20px;
  letter-spacing: 0.1em;
}
.footer .bot {
  border-top: 1px solid rgba(214, 205, 190, 0.15);
  margin-top: 64px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  opacity: 0.6;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ Mobile Hamburger ============ */
.nav-burger {
  display: none;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: 2px;
  position: relative;
  cursor: pointer;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.3s ease;
}
.nav-burger:hover { border-color: var(--c-gold-deep); }
.nav-burger span,
.nav-burger span::before,
.nav-burger span::after {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 1.5px;
  background: var(--c-ink);
  transform: translateX(-50%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              top 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease,
              background 0.3s ease;
}
.nav-burger span { top: 50%; margin-top: -0.75px; }
.nav-burger span::before, .nav-burger span::after { content: ''; left: 0; transform: none; }
.nav-burger span::before { top: -7px; }
.nav-burger span::after  { top: 7px;  }
.nav-burger.is-open span                  { background: transparent; }
.nav-burger.is-open span::before { top: 0; transform: rotate(45deg); }
.nav-burger.is-open span::after  { top: 0; transform: rotate(-45deg); }

/* ============ Mobile Drawer ============ */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26, 23, 20, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 48;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.mobile-drawer-backdrop.is-open { opacity: 1; pointer-events: auto; }

.mobile-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(380px, 85vw);
  background: var(--c-champagne);
  z-index: 49;
  display: flex;
  flex-direction: column;
  padding: 100px 40px 48px;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -10px 0 40px rgba(26, 23, 20, 0.12);
}
.mobile-drawer.is-open { transform: translateX(0); }

.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-drawer a {
  font-family: var(--font-zh-serif);
  font-size: 26px;
  letter-spacing: 0.12em;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line);
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.25s ease;
  position: relative;
}

.mobile-drawer a::before {
  content: '';
  position: absolute;
  left: -40px; top: 50%;
  width: 3px; height: 0;
  background: var(--c-gold-deep);
  transform: translateY(-50%);
  transition: height 0.3s ease;
}

.mobile-drawer a.is-active::before { height: 24px; }
.mobile-drawer a.is-active { color: var(--c-gold-deep); }

.mobile-drawer.is-open a {
  opacity: 1;
  transform: translateX(0);
}
/* staggered delay for menu items */
.mobile-drawer.is-open a:nth-child(1) { transition-delay: 0.08s; }
.mobile-drawer.is-open a:nth-child(2) { transition-delay: 0.14s; }
.mobile-drawer.is-open a:nth-child(3) { transition-delay: 0.20s; }
.mobile-drawer.is-open a:nth-child(4) { transition-delay: 0.26s; }
.mobile-drawer.is-open a:nth-child(5) { transition-delay: 0.32s; }
.mobile-drawer.is-open a:nth-child(6) { transition-delay: 0.38s; }

.mobile-drawer a:hover { color: var(--c-gold-deep); }

.mobile-drawer .drawer-footer {
  margin-top: auto;
  padding-top: 40px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease 0.35s, transform 0.4s ease 0.35s;
}
.mobile-drawer.is-open .drawer-footer {
  opacity: 1;
  transform: translateY(0);
}

.mobile-drawer .drawer-footer .phone {
  font-family: var(--font-num);
  font-size: 22px;
  color: var(--c-gold-deep);
  letter-spacing: 0.05em;
}
.mobile-drawer .drawer-footer .phone-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-ink-soft);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.mobile-drawer .drawer-footer .btn-gold {
  display: inline-block;
  margin-top: 20px;
  font-size: 13px;
  padding: 12px 28px;
}

/* Close button inside drawer */
.drawer-close {
  position: absolute;
  top: 16px;
  right: var(--gutter);
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.3s ease;
}
.drawer-close:hover { border-color: var(--c-gold-deep); }
.drawer-close::before, .drawer-close::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 1.5px;
  background: var(--c-ink);
  transition: background 0.3s ease;
}
.drawer-close::before { transform: rotate(45deg); }
.drawer-close::after  { transform: rotate(-45deg); }

/* ============ Responsive ============ */
@media (max-width: 1100px) {
  /* 4-col doctor grid -> 2-col on tablet */
  .doctors-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 24px !important; }
  .doctors-grid > a { margin-top: 0 !important; }
}

@media (max-width: 900px) {
  :root { --gutter: 5vw; }
  .section { padding: 80px 0; }
  .section-tight { padding: 60px 0; }

  /* Nav: hide desktop bits, show burger */
  .nav-links { display: none; }
  .nav-cta .phone { display: none; }
  .nav-cta .btn-gold { display: none; }
  .nav-burger { display: inline-block; }
  .nav-inner { padding: 16px var(--gutter); }
  .nav-logo { font-size: 17px; }
  .nav-logo small { font-size: 9px; }

  /* Numbers */
  .num-wall { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .num-wall .num { font-size: clamp(56px, 16vw, 110px); }

  /* Treatment row */
  .tr-row { grid-template-columns: 50px 1fr auto; gap: 16px; }
  .tr-row .name-zh { font-size: 22px; }
  .tr-row .name-en { font-size: 13px; }
  .tr-row .no { font-size: 18px; }

  /* Footer */
  .footer { padding: 60px 0 24px; }
  .footer .grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  /* Hero (homepage) → single column */
  .hero .container {
    grid-template-columns: 1fr !important;
    padding-top: 130px !important;
    padding-bottom: 60px !important;
    gap: 40px !important;
  }
  .hero .container > div:nth-child(2) img {
    max-height: 50vh !important;
  }

  /* Narrative section on homepage */
  .narrative-grid { grid-template-columns: 1fr !important; gap: 40px !important; }

  /* Doctor matrix on homepage: 3-col → 1-col */
  .doc-matrix-top, .doc-matrix-bottom { grid-template-columns: 1fr 1fr !important; gap: 20px !important; }
  .doc-matrix-top > a:first-child { grid-row: span 1 !important; grid-column: span 2; }

  /* Treatments split-screen → stack vertically */
  .tr-split { grid-template-columns: 1fr !important; min-height: auto !important; }
  .tr-split > div:first-child { min-height: 45vh; }
  .tr-split > div:last-child { padding: 60px var(--gutter) !important; }

  /* Doctor detail page: 5/7 → stack */
  .doc-detail { grid-template-columns: 1fr !important; }
  .doc-detail > div:first-child { min-height: 60vh !important; }
  .doc-detail > div:nth-child(2) { padding: 60px var(--gutter) !important; }

  /* Treatment detail page 1fr/1.6fr → stack */
  .treatment-narrative { grid-template-columns: 1fr !important; gap: 32px !important; }

  /* Generic 3-col grids on treatment / about / index */
  .grid-3col-resp { grid-template-columns: 1fr 1fr !important; gap: 20px !important; }
  .grid-3col-resp > a, .grid-3col-resp > div { margin-top: 0 !important; }

  /* 4 honors → 2-col */
  .grid-4col-resp { grid-template-columns: 1fr 1fr !important; gap: 16px !important; }

  /* Env gallery */
  .env-gallery { grid-template-columns: 1fr 1fr !important; gap: 12px !important; }
  .env-gallery > img:first-child { grid-row: span 1 !important; grid-column: span 2; aspect-ratio: 16/9 !important; }

  /* Big section titles smaller */
  h1.font-zh-serif { font-size: clamp(40px, 11vw, 64px) !important; }
}

@media (max-width: 560px) {
  .footer .grid { grid-template-columns: 1fr; }
  .doc-card-meta .zh { font-size: 22px; }
  .num-wall { grid-template-columns: 1fr; gap: 32px; }
  .grid-3col-resp, .grid-4col-resp, .doctors-grid { grid-template-columns: 1fr !important; }
  .doc-matrix-top, .doc-matrix-bottom { grid-template-columns: 1fr !important; }
  .doc-matrix-top > a:first-child { grid-column: span 1; }
  .env-gallery { grid-template-columns: 1fr !important; }
  .env-gallery > img:first-child { grid-column: span 1; }
  .section-no { font-size: 12px; }
}